Pump



June 2'4, w. H. J. LANNERT Al. 1,767,535

PUMP

Filed April 30, 1928 ATTORNEY 'WILLIMZI H. il.

LAJTNERT AND PAUL W. COWLE, @E GHAGO, JLLLICNES, ASSGNORS mais 'E0 CHICAGO PUMP COMPANY, 0F CHICAGO, LLNGIS, 191 CORPORATIN' F KLLINOIS PUMP '.lhis invention relates topumps, and more particularly to motor driven water pumps of the vertical type, such as are used for pumping water out of wells, flooded base- 5,: ments, and the like, although it is to be understood that its use is not limited thereto.

One of the objects of this invention is to provide a pump unit which shall be readily portable, and having adjustable legs for adjustably supporting the pump structure, whereby the latter may be raised or lowered so as to locate the pump inlet at any desired height with respect to the door upon which the pump structure is placed. Another object is to provide simple and improved means for adjusting the impeller shaft so as to properly locate the impeller within the pump casing.

Another object is tovprovide a novel conzonection between the pump casing and discharge pipe. Another object is to provide an electric motor bperated pump having a float operated switch mounted directly on the motor casing.

@ther objects and advantages will appear in the course ot this specification, and with said objects and advantages in view, this invention consists in the several novel teatures of construction, arrangement and comeo bination of parts hereinafter fully set :forth and claimed.I

'lhe invention is clearly illustrated in the drawing accompanying this specication in which- Figure 1 is a side elevation, partly brolren away., ot a pump embodying a simple form of the present invention;

Fig. 2; is a detail horizontall section taken on the line 2-2 oit Fig. l;

llig. 3 is a detail horizontal section talren on the line 3-3 oi lFig. l; and

Fig. 4 is a detail vertical cross section taken on the line l-d of Fig. l., 0

Referring. to said drawing, which 1llustrates a simple embodiment ot the present invention, the reference character 5 designates an electric motor of conventional i'orm mounted upon and secured to a tripod 6. The ytripod is preferably formed with a; botto tom plate 7, to the lower side of which 1s se- 1ere. serial no. eraan.

cured a tubular housing 8 of suitable length and having secured to its lower end the pump casing 9 of a centrifugal pump, in which is contained an impeller 10 mounted upon an impeller shaft 11 which extends up through fthe housing and is connected to the motor shaft 12 by a shaft coupling 13.

0n the lower side of the pump casing 8 is a screenor perforated hood 111 whlch covers the inlet to the pump. The pump casing 9 is formed with a discharge`- outlet member 15 in which is contained the lower end of a discharge pipe 16 that extends parallel with the housing 8 and is secured in the bottom plate 7 of the tripod by a set screw 17.. Y

rllhe pump unit is supported by legs 18, here shown in the form of rods, the upper ends of which extend through bosses 19, formed on the bottom plate 7 and are held 70 therein by screws 20 which are threaded in the bosses and impinge against the vupper end portions of the legs 18. Said legs diverge towards the bottom of the structure and the lower ends are spaced apart and held in xed position by braces 21 which are bolted to the pump casing 8 by bolts or screws 22 that pass through ea'rs 23 formed on the pump casing. .c

Each brace has a flat horizontal part 80g through which the bolt or screw 22 passes, and the outer or end portion is bent downwardly at a slight angle (see Fig. 1), and formed with a hole to receive one of the legs of the pump structure, 'lhe diameter of the hole is substantially the same as the diameter of the leg, whereby when the brace is fastened in place by the bolt, the opposite edges of the hole are caused to impinge against the leg, and thereby securely hold Ait in place. ln case it is desired to raise or lower the pump proper, the set screws 20 and the bolts 22 are loosened which ermite the legs to be adjusted lengthwise ot themselves, and after the adjustment has been made, the set screws 20 and bolts 22 are tightened, thereby rigidly' fastening thelegs in their adjusted position.

ln order to afford a close adjustment for the impellcr with respect to the pump casing Elco 9, an adjustment screw 24 is provided at peller shaft. As shown, a washer or disk 25 is interposed between the head of the adjustment screw 24 and the coupling member 13a. A ball bearing assembly 26 is interposed between the bottom plate 7 of the tripod, and lower coupling member 13a and forms the supporting connection between the tripod and impeller shaft. To obtain the proper adjustment of the impeller, the adjustment screw 24 is turned to the right or left, as the case may be, thereby moving the impeller shaft in an endwise direction.

A novel leak proof joint is provided between the lower endof the discharge pipe 16 and the discharge outlet member 15 of the pump casing, and, as shown, said joint is provided by forming an annular groove 27 in the inner face of the upright wall of the part 15 and inserting a compressible packing ring 28 therein whose internal diameter is less than the external diameter of the discharge pipe. In assembling the parts, the discharge pipe is forced down through the hole in the ring 28, and the body of the rin is thereby compressedin the groove, ma ing a water tight joint between the pump casing and discharge pipe.

The pump structure being readily port-` able, and with a view toward simplifying the electric connections for the pump motor, the electric switch 30 for the motor is mounted upon the side of the` housing or casing of the motor, as shown in Fig. 1. In order to automatically control the operation of the pump, a oat 31 is provided which is carried by a fioat rod 32 guided in a bracket 33 mounted on the tripod 6, said float rod hav-` ing buttons 34 secured at its upper end and arranged to engage with and actuate the J switch lever 35 of the electric switch 30.

Instead of supporting the pump structure by the legs 18, said legs and braces may be dispensed with and a floor plate, such as is shown and described in a co-pen'ding application, Serial No. 273,784, filed on even date herewlth, may be used whenever it is desired to support the pump at a considerable distance above thebottom of a well or other reservoir, as is more fully set forth in said application.

In use, the legs are adjusted so as to locate the pump proper `as close to the Hoor upon which the pump structure is standing as is desired. When the water risesy and raises the float suficiently, the lower button 34 engages with theswitch lever 35 and closes the circuit to the motor, thereby starting the same, whereupon the impeller is rotated and the water discharged through the dischargeV pipe 16. As soon as the levell of the Water falls suiiciently, the float lowers and opens the switch when the upper button 34 encounters the switch lever 35, thereby stopping the motor.

We claim as new, and desire to secure by Letters Patent r 1. In an electric motor driven pump unit, the combination of a tripod, an electric motor -supported and secured thereon, a housing for an impeller shaftsecured to said tripod and extending down therefrom, a pump secured to the lower end of said housing, and supporting legs adjustably and removably secured to said tripod and forming the support for the entire unit.

2. In an electric motor driven pump unit, the combination of a tripod, an electric motor supported and secured thereon, a vertical housing for an impeller shaft secured to the tripod and extending down therefrom, a

`pump casing on the lower end ofsaid housing, animpeller shaft in said housing and coupled to the motor, supporting legs adjustably secured in said tripod and extending down beyond the bottom of said pump casing, and apertured braces secured to said pump casing and surrounding and frictionally engaging said legs.

3. In an electric motor .driven pum unit, the combination of a tripod formed wlth leg receiving bosses, an electric motor supported by and secured on said tripod, a housing for an impeller shaft secured to said tripod and rextending down therefrom, a pump secured to the lower end of the housing and driven by said motor, and supporting legs 'secur'ed in said bosses and extending down therefrom beyond the pump and forming the support for the entire unit.

WILLIAM I-I. J. LANNERT. PAUL W.'COWLE. 

